Question
There are a total of 20 Mongolian, Korean and Vietnamese stalls at a food court. The number of Mongolian stalls is twice the number of Vietnamese stalls. The number of Vietnamese stalls is thrice the number of Korean stalls. How many more Mongolian than Vietnamese stalls are there at the food court?
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There are a total of 20 Mongolian, Korean and Vietnamese stalls at a food court. The number of Mongolian stalls is twice the number of Vietnamese stalls. The number of Vietnamese stalls is thrice the number of Korean stalls. How many more Mongolian than Vietnamese stalls are there at the food court?